Blood Flow Quiz

The rate at which blood flows through the human body changes in response to many factors. Which statement describes one of these factors and its effect on blood flow?

• The narrowing of blood vessels increases pressure and leads to faster blood flow.

• High blood viscosity increases the resistance in the blood vessels and leads to slower blood flow.

• Low blood pH decreases the rate of diffusion through the blood vessels and leads to slower blood flow.

• The changing of the shape of red blood cells to a crescent shape decreases resistance and leads to faster blood flow.

Based on the graph to the right, which of the following would be the best conclusion about blood flow and breathing relates to?

• A high level of oxygen in the bloodstream causes increased blood flow

• Clots in the blood vessels that form due to disease cause increased blood flow

• Exercise causes increased blood flow as the heart rate increases

• High viscosity leads to increased blood flow as the heart can more easily pump blood through the vessels

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If an individual experiences a severe injury leading to a drop in blood volume, which of the following will occur?

• a decrease in blood pressure

• an increase in blood viscosity

• a decrease in blood pH

• an increase in blood oxygen

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Which of the following factors decreases blood flow?

• a decrease in blood viscosity

• an increase in blood pressure

• an increase in overall blood volume

• a decrease in the radius of a blood vessel

If a person has coronary heart disease, some of the vessels that supply blood to the heart can become narrowed. Which of the following would you also expect to find in a patient with coronary heart disease?

• low heart rate

• high blood pH

• low blood volume

• high blood pressure

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Jim was told that he might need to go on medication if his blood pressure continues to be high. What causes blood pressure?

• cholesterol in the blood

• stress that exercise puts on heart muscle

• contraction of the ventricles in the heart

• removal of oxygen from the blood

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The rate at which blood flows through the human body changes in response to many factors. Which statement describes one of these factors and its effect on blood flow?

• high viscosity of blood causes an increased resistance in the blood vessels and leads to slow blood flow.

• low blood pH decreases the rate of diffusion through the blood vessels and leads to slow blood flow.

• the changing of the shape of red blood cells to a crescent shape decreases resistance and leads to faster blood flow.

• the narrowing of blood vessels increases pressure and leads to faster blood flow.

Which of the following factors would most directly affect blood flow through the circulatory system?

• blood pressure

• blood sugar

• respiratory rate

• outside temperature

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Which of the following best describes the connection between cardiovascular disease and age?

• As people age, their blood vessels become more elastic leading to less cardiovascular disease.

• As people age, the heart becomes more efficient with each pump, increasing cardiac output.

• As people age, blood pressure decreases leading to more cardiovascular disease.

• As people age, plaque builds up in the arteries increasing vessel resistance, which leads to disease.